Make them all the same size is easy just click on one and copy it and paste, you now have 2 the same size.
If you move one inline with the other, little blue lines appear when you are dead inline.

Also in the property window to the right, there is a line near the bottom, gives you height and width of the object, type the same numbers in from another box and the designer with auto size it for you.

I do appreciate your suggestions but I must admit you guys must have better "mouse control" than I have. I seem to get one column "just right" and then decide to move it to the left "just a little". During the move, I manage to change the size of all of the objects.

A grid with a snap feature would really help. I know you can`t do everything and believe me when I say this is one heck of a program. Many, many features I have yet to explore.

If not a snap then perhaps a check box that says "freeze this objects' size".

The "undo" function in the edit tab
once you have an object where you want it, in the properties menu on the right hand side is a lock function. one you lock it
hell on earth wont move it till you unlock it again. However be aware the lock function only works for your current editing session.
If you shut the designer down and reopen it all locks are auto-reset to "off"
Not an insurmountable issue. Just put the mouse pointer top left of screen, hold down button, draw a box around everything on the screen.
Then in properties click "lock" and everything you included in the box you high-lighted is locked again.

And lastly , click "Apply" a lot, it kinda functions as a autosave.

I have 42 radio buttons in 21 paired boxes with 21 picture boxes under neath them, first thing I do is lock them every new session.

Great advice Mike, I've added getting that lock function to persist to our request list (not sure why its not). We also longer term want to add undo and redo functionality (no small job I'm told). I think this would help in the situations when things are accidentally resized or edited.